Pros: psychic power cards at 16$. this isn't.It had all the rulebook psychic powers and descriptions of all the power types that you can view under the powers descriptionit lets you randomly roll for each psyker in the game.it lets you add your psykers including letting you take a picture to clearly identify which psyker has which powers.shows all the psychic units from all codex'shas a tracker to show how many powers you used per unit and turn in addition to a turn counter

Cons:12$it doesn't appear to have base codex powers.no option to add powers you have to roll every time (makes sense but i still wish it was there)can only use inbuilt camera to select psyker image

I'm going to say its very useful to keep track of which units have what but it is expensive and if your not going psyker heavy it might not be worth it.

quick update on this, it just released an update with the chaos marine powers so looks like new powers from new codex's will be added.quick update to update: (long string of explitives) are charging 6$ to add chaos powers.